Scraper with power tilt mechanism



May-30, B33,

c. LE BLEU SGRAPER WITH POWER TILT MECHANISM Filed Feb. 24, 1930 'IHIIHII IIIHHHI.

HIM.

2 Sheets-Sheet l Y I C/zar/as 16 5/60 WM'WW A TTORNEK? c. LE BLEU 1,911,629 SCRAPER WITH POWER TILT MECHANISM 2 Sheets-Sheet 2 Filed Feb. 24. 1930 INVENTOR Char/es 1e fi/eu A TTORNEKS Patented May 30, 1933 GHARLE LE BLEU, LOS ANGELES, CALIFORNIA SCRAPER WITH POWER TILT MECHANISM Application filed February 24, 1930. Serial No. 430,675.

This invention relates to a power operating mechanism for revolving scrapers. A type of scraper in extensive use comprises a bowl F mounted in a frame so as to be revoluble about a horizontal axis and having a digging edge or lip 'to be maintained approximately in contact with the surface of the ground. The drag of the bowl over. the surface tends to turn the bowl about its axis, but this tendency may be opposed by suitable detent mechanism. 'When it is desired to load the scraper, this mechanism is released, allowing the bowl to turn a part of a revolution, and causing the lip to dig into the ground, into the bowl. When it is desired to empty the load, the detent mechanism is again released, allowing the bowl to turn bottom up. The detent may again be released allowing the bowl to return to its initial position, when desired, making ready for another cycle of operations. It will be plain that the pres sure on the detent resisting the rotation of the bowl of a largescraper will be very great,

and accordingly many arrangements of links and levers have been tried, in order to render it possible for the operator to move the detent. An im rovement in the type of scraper just described is the provision of mechanism for returning the bowl to its initial position after di ging a partial load. This requires a great eal of force, and several complicated arrangements have been plish it.

It is a primary object of this invention to provide a revolving scraper having improved detent mechanisms adapted to be power operated as by the motive power of the tractor drawing the scraper. A second object of this invention is the provision of novel bowl actuatin means, whereby the operation of such mec anism may be easily controlled by the operator. Other objects include the pro-- vision of such a scra r and actuating mechanism which will b: of inexpensive and rugged construction, and easy and, positive operation.

In the accompanying drawings, Fig. 1 is a side elevation of a scraper having my improved operating mechanism; Fig. 2- is an elevation on an enlarged scale of a portion of devised to accomscraping a load.

forked lever 38, whichis pivota the operating mechanism; Figs. 3, 4, and 5 a are sections on an enlarged scale as seen on the correspondingly numbered lines of Fig. 1; Fig. 6 is a detail of the-control mechanism; and Fig. 7 is a section as seen on line I 7-7 of Fig.

Referrin with more particularity to the drawings, t e bowl of the scraperis indicated by 10, and as shown comprises substantially circular end plates 11 joined by a back or bottom 12, the end or lip ported b suitable latter terminatingin a digging 13. The bowl is revolubly suptrunnions 14 journalled at ends 1n earings 15 secured to the side members of a frame 16. The frame is shown carried on ground wheels 17 at its rear end and has its forward end supported by draw bar linkage 18 which connects it to the rear of a tractor 19. Each end plate 11 is provided with a riding shoe 21. Secured to plate 12 midway between the end plates are a pair of angle irons 22, disposed back to back with i a s ace between.

upported on frame 16 ahead of the bowl is a post 23 carrying a, bearing 24 which supports one end of screw shaft 25. The other end of this is journalled in a second post or upright 26. A flat bar 27 of substantially inverted V-form serves to brace post 26 and is provided with an additional caring for the screw shaft. A gear wheel 28 and sprocket 29 are secured to shaft 25, one on each side of post 26. Secured to post 26 is a bushing 30 having hubs 31 and 32 projecting from opposite sides. J ournalled on able therein is shaft 35, which projects through a suitable bearing in bar 27 and has a universal joint 36 at its forward-end. It is also provided with a shifting sleeve mechanism 37 having pins engaged by a ly mounted in a bracket 39 formed on bar 27. Lever 38 has a quadrant 40 adapted to have hand lever 41 plnned to it, and extending to witha in easy reach of the operator. I The construction is such that the 'angle at which lever 41 stands may be altered by pinning it to a.

different hole in quadrant 40, and by swinging these hubs are members 33 and 34'offriction clutches. J ournalled in bushing 30 and SIM- clutch members 43 it with lever 38 about its pivot, shaft may be moved axially. Secured to shaft 35 are and 44 adapted to alternately engage with clutch members 33 and 34 or be disposed in neutral position as shown in Fig. 6. Secured to clutch member 33 is a sprocket 45, connectedto sprocket 29 by a roller or other type chain 46. Similarly secured to clutch member 34 is apinion 4 engaging gear 28. Shaft 35 is driven by the power take off shaft 48 of the tractor through shaft 49 and universal joints 36 and 50. Thus shaft 35 revolves continually when the tractor motor is in operation, but with companion clutch members 33, 43, and companion clutch members 34, 44 out of engagement, no rotational movement will be transmitted to shaft 25. By swinging lever 41 upwardly, companion clutch members 33, 43 will be engaged and shaft 25 will be rotated in the same directionas .shaft 35 by means of the chain and sprockets. If lever 41 is swung down, companion clutch members 34, 44 Wlll be engaged and shaft 25 will be rotated in the opposite direction by means of the gearing.

A nut 51 threadedly engaged with shaft 25 has pinned to it a pair of side arms 52 forming a connecting bar between which is secured a filler plate or cam 53 resting on a roller 54 mounted near the upper end of post 23. Pivotall mounted between bars 52 near their rear en s is a dog or hinged latch 55, having projecting ears 56 to limit its downward movement. Pivotally mounted between bars 52 intermediate the filler and the latch is a dog or hinged latch 57 supported by a pair of links 58 from a lever 59 pivotally mounted on the to of bars 52. A cable 60 extends forward rom lever 59 to within convenient reach of the operator. Detent pins 61 and 62 are secured to angles 22 on the bowl and form projections for the latches.

With all parts in the positions shown in the drawings, and the tractor the direction of arrow A Fig. 1, no loading or diggingwill occur. When it is desired to load, lever 41 is depressed causing shaft 25 to revolve and bring nut 51 forward, the direction of the screw thread bein so arranged with regard to the direction 0 rotation of shaft 35 that this will occur. Latch 55 will engage pin 61 and turn the bowl in a clockwise direction causing lip 13 to engage the ground surface. When the desired depth of cut is reached, lever 41 is returned to its neutral position, stopping rotation of shaft 25 and holding the bowl against further turning. The screw and nut act as a lock to hold the bowl in position. If it is desired to reduce the depth of cut or cease digging .entirely, lever 41 may be raised which will ca se shaft 25 to revolve in the opposite direction, moving nut 51 to the left (Figs. 1

and 2) and causing latch 57 to push on pin 60 will raise latch 57 moving ahead in 61, turning the bowl in a counter clockwise direction and raising lip 13 out of the ground. These operations can be repeated in varying degrees until the bowl is loaded or it is desired to dump the contents.

When it is desired to dump the bowl, cable 60 is pulled swinging lever 59 and liftin latch 57 out of the way of pin 61. The bow will immediately turn in a clockwise direction due to the over balance of the load and the drag of the lip on the ground. The pull on the cable is released as soon as the bowl starts to dump, thus latch 57 will engage pin 62 when it comes to it and hold the bowl in riding position, that is, with shoes 21 on the surface of the ground. Another pull on cable permitting pin 62 to pass, and the bowl to return to its initial position. Latch 55 being freely pivoted will lift to allow pins 61 or 62 to pass under it, when the bowl turns forward, but will enga e one or the other and prevent its turning bac ward. The contour of the lower edge of plate 53 in contact with the roller 54 is'such that as nut 51 is moved forward or back, bars 52 will be swung about their connection to the nut so as to maintain proper relation between latch 55 and latch 57 and pin 61, which will have a radial path as it is moved.

Although, I have shown the transmission control mechanism mounted on the frame of the scraper, the invention is not limited to such position. Obviously, it may be mounted on the tractor frame.

What I claim is 1. In a scraper, a frame, a bowl revolubly mounted thereon having projections; a connecting bar having latch means for engagement with the projections, said latch means comprising dogs facing one another, both said dogs being pawls hinged to said connecting bar at their remote ends and having a space between their confronting faces for reception of a projection whereby a projection may freely approach said space from either side of said latch means, manually operable means to lift the front dog and release a projection; power actuated mechanism to cause said connecting bar to be moved longitudinally in either direction and when coupled to said bowl to revolve the latter; and manually operable control means for said power actuated mechanism to cause said connecting bar to travel longitudinally in either direction a selected distance.

2. In a scraper, a frame, a bowl revolubly mounted thereon having projections; a connecting bar having latch means for engagement with the projections, said latch means being normally urged into coupling engagement with a projection and bei." g manually operable to release a PIOjQClZlOII; power actuated mechanism to cause said connecting bar to be moved longitudinally in either direction and when coupled to said bowl to,

revolve the latter said power actuated mechanism including transmission gearing, a screw shaft and nut coupling said gearing and sald bar for moving the latter longitudinally; and manually operable control means for said power actuated mechanism to cause saidconnecting bar to travel longitudinally in either direction a selected distance. 3. In a scraper, a frame, a bowl revolubly 30 mounted thereon having projections; a connecting bar having latch means for engagement with the projections, said latch means being normally urged into coupling engagement with a projection and being manua ly operable to release a projection; power actuated mechanism. to cause said connecting bar to be moved longitudinally in either d1- rection and when coupled to said bowl to revolve the latter, said power actuated mecha- -go nism including transmission gearing with two drive gears, one to cause rotation of said gearing in one direction and the other to cause rotation of the gearing in the opposlte direction, a'drive shaft, a screw shaft and nut coupling said gearing and said bar for moving the. latter longitudinally; and manually operable control means for said power actuated mechanism to cause said connecting bar to travel longitudinally in either direcso tion a selected distance, said control means including a clutch o rable at will to 'alterd nately clutch said said drive gears.

4. In a scraper, a frame,

rive shaft to either of a bowl revolubly =35 mounted thereon having projections; a connecting bar having latch means for engagement with the projections, said latch means comprising dogs facing one another with a space therebetween for reception of a projection, the rear dog being a projection to pass thereby, manually operable means to lift the front dog and release a projection, a cam on said connecting bar to cause said bar in its longitudinal movement to follow a rojection in its travel; power actuated mec anism to cause said connectin bar, to be moved longitudinally in either direction and when coupled to said bowl to revolve thelatter; and manually operable control means for said power actuated mechanism to cause said connecting bar to travel longitudinally in either direction a selected distance.

5. In a scraper, a frame, a bowl revolubly mounted thereon having projections; a connecting bar having latch means for engaged ment with the projections, said latch means including dogs facing one another, both said dogs being pawls hinged to said connecting bar at their remote ends and having a space between their-confronting faces for reception of a projection whereby a projection may freely approach said space from either side of said latch means, manually operable means to lift the front dog and release a projection,

a pawl to permit 1 g mission gearing with two drive a cam on said connecting bar to cause said bar in its longitudinal movement jection in its travel; power actuated mechanism to cause said connecting bar to be moved longitudinally in either direction and when cou led to said bowl to revolve the latter; an manually operable control means for said power actuated mechanism to cause said connecting bar to travel longitudinally in either direction a selected distance.

6. In a scraper, a frame, a bowl revolubly mounted thereon having projections; a connecting bar having latch means for engagement with the projections, said latch means being normally urged into coupling engagement with a projection and being manually operable to release a projection, a cam on said connecting bar to cause said bar in its longitudinal movement to follow a projection in its travel; power actuated mechanism to cause said connecting bar to be moved longitudito follow a pronally in either direction and when coupled to said bowl to revolve the latter, said power actuated mechanism including transmission gearing, a screw shaft and nut coupling said gearing and-said bar for moving the latter longitudinally; and manually operable control means for said power actuated mechanism to cause said connecting bar to'travel longitudinally istance.

7'. In a scraper, a frame, a bowl revolubly mounted thereon having projections; a connecting bar having latch means for engagement with the projections, said latch means being normally urged into ment with a projection and being manually operable to release a projection, a cam on said connecting bar to cause. said bar in its ongitudinal movement to follow a projection in its travel; power actuated mechanism to cause said connecting bar to be moved longitudinally in either direction and when cou pled to said bowl to revolve the latter, said power actuated mechanism including transgears, one to cause rotation of said gearing in one direction and the other to cause rotation of the shaft, aserew shaft and nut coupling said in either direction a selected,

gearing and said bar for moving the latter longitudinally; trol means for nism to cause and manually operable consaid power actuated mechasald connecting bar. to travel longitudinally in either direction a selected lstance, said control means including clutches operable necting bar ha ing latch means comprising two dogs for engagement with the projections, both said dogs being pawls' hinged to said connecting bar at their remote ends and havinga space between their confronting.

at w ll to alternately clutch said drive shaft to either of said drive gears.

faces for reception of a projection whereby a projection may freely approach said space from either side of said latch means, manually operable means to lift the front do 5 and release a projection; power actuate mechanism to cause said connecting bar to be moved longitudinally in either direction and when coupled to said bowl to revolve the latter, said power actuated mechanism ineluding transmission gearing with two drive gears, one to rotate the gearmghin one direction and the other to rotate t e earing in the opposite direction, a drive shaft, a screw shaft and nut coupling said gearing to said i bar; and manuallyoperable control means i for said power actuated mechanism to cause said connecting bar to travel longitudinally in either direction a selected distance, said control means including clutches operable at will to alternately clutch said drive shaft to either of said drive gears.

9. In a scraper, a frame, a bowl revolubly mounted thereon havin projections; a connecting bar having latc means for engagement with the projections, said latch means being normally urged into coupling engagement with a projection, a cam on said connectin bar to cause said bar in its longitudina movement to follow a projection in its travel, said latch means including opposing pawls hinged to said bar at their remote ends and havin' a space between their confronting faces or reception of a projection whereby a projection may freely approach said space from either side of said latch means, manually operable means to lift the front dog and release a projection; power actuated mechanism to cause said connecting bar to be moved longitudinally in either di- 40 rection and when coupled to said bowl to revolve the latter, said power actuated mechanism including transmission gearing with two drive gears, one to cause rotation of said gearing in one direction and the other to cause rotation of the gearing in the opposite direction, a drive shaft, a screw shaft and nut coupling said gearing and said bar for: moving the atter longitudinally; and manually operable control means for said power 59 actuated mechanism to cause said connecting bar to travel longitudinally in either direction a selected distance, said control means includin clutches o rable at will to alternately c utch said ive 'shaft to either of said drive gears.

In witness that I claim the fore oing I have hereunto subscribed my name tl iis 20th day of February, 1930. v

- v 2 CHARLES LE BLEU. 

